/**************************************************************************** * net/iob/iob_concat.c * * Copyright (C) 2014 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #if defined(CONFIG_DEBUG_FEATURES) && defined(CONFIG_IOB_DEBUG) /* Force debug output (from this file only) */ # undef CONFIG_DEBUG_NET # define CONFIG_DEBUG_NET 1 #endif #include #include #include "iob.h" /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: iob_concat * * Description: * Concatenate iob_s chain iob2 to iob1. * ****************************************************************************/ void iob_concat(FAR struct iob_s *iob1, FAR struct iob_s *iob2) { /* Find the last buffer in the iob1 buffer chain */ while (iob1->io_flink) { iob1 = iob1->io_flink; } /* Then connect iob2 buffer chain to the end of the iob1 chain */ iob1->io_flink = iob2; /* Combine the total packet size */ iob1->io_pktlen += iob2->io_pktlen; }